We are trying to update our overhead porch fixture probably wired about 1975. I failed to notice how it was
wired when I removed it. It has two complete circuits, a black and white wire each plus a ground however I don't believe the grounds were attached to anything. The wall switch, a Bryant like my breakers, is no longer available and has
no ground connector that I can see. One circuit powers the bulb with the switch off, if the breaker is not tripped. The other has no effect.
I would like to hook up a modern fixture operated by the switch.
bjschnell posted a similar problem on 06-15-09, except the fixture I am trying to install only has 1 black and 1 white wire. JLMCDANIEL provided the following response
Just a guess. One set of black and white wires is the power feed the other is to the switch. You will need to find out which has power. Once you know which has power connect the black lead to the white wire going to the switch, mark or tape that white wire black. You now have a white wire from the power source and the black wire from the switch. Connect the white wire to the two white wires from the light and the black wire to the two black wires from the light.
I'm going to try this when I get home this evening, but I'm really curious about the ground(s) or lack thereof. Any suggestions as to why the fixture wouldn't be grounded?